Rotary engine.



PATENTED PEB. 14, 1905.

RUBEN,

ROTARY ENGINE. r APPLIOATION FILED MAB.. '7, 1904.

3 SHEETS-SHEET 1.

Smmntov .Eau/art -em m13 l M 5,77 @y rfofmuo No. 782,802. PATENTED FEB.14. 1905.

E. URI-IN1 ROTARY ENGINE.

APPLIOATION FILED 1mm, 1904.

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@n menton Edu/ard 27736114 PATENTED PEB. 14, i905.

E. UREN.

ROTARY ENGINE.

APPLIOATION FILED MAR. 7. 1904.

3 SHEETS-SHEET 3.

. Suucnto .E'duzavd Uew.

UNTTED STATES Patented February 14, 1905.

PATENT QEETCE.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 782,802,

dated February 14, 1905.

Application filed March 7, 1904. Serial No. 196,997.

T rif/ZZ wil/077e t may con/cern:

Be it known that I, EDWARD UREN, a citizen of the United States,residing at Sacramento, in the county of Sacramento and State ofCalifornia, have invented a newand useful Rotary Engine, of which thefollowing is a specification.

This invention relates to that class of engines having' a revolvingpiston, a movable abutment, and means for admitting steam into the spacebetween the piston-head and the abutment.

The objection to many of therotary engines heretofore designed has beenthat they are too complicated for practical use, and while theoreticallyan improvement in the art, yet praetically they break down undercontinuous use owing to the multiplicity of parts, especially of valves,springactuated abutments, and sliding piston-heads projected outwardlyby springs.

The object of this invention is to provide a rotary engine of the fewestpossible parts consistent with an operative practical engine, wherebythe whole may be strongly and durably constructed at a reasonable cost.In this engine but one valve, one cam, one abutment, and one piston-headis employed, and all these parts are moved positively and do not dependon gravity or the force of springs for their movement.

My invention also consists in the novel features of construction andcombination of parts hereinafter described, particularly pointed out inthe claims, and shown in the accompanying drawings, in which` Figure lis an end elevation of my engine. Fig. 2 is a vertical section on theline 2 2 of Fig. 3. Fig. 3 is a longitudinal vertical section on theline 3 3 of Fig. 2.

In the drawings, A represents a cylinder of the desired size, andextending' longitudinally along the top of the cylinder A is a casingA', having parallel side walls and opening downwardly into the cylinderA. The cylinder A is supported by suitable brackets upon a bedplate A.Passing longitudinally through the cylinder A is a shaft B, having adrivingwheel B keyed thereto. The shaft Bis rotatably journaled in thecylinder-heads D and extends through the said heads. Secured to theperiphery of the wheel B and extending practically from onecylinder-head D to the other is a piston-head C. The sides of thepiston-head are inclined so as to be disposed at right angles totangential lines touching the periphery of the wheel B. Parallellongitudinally-extending recesses are formed in the piston-head, andsockets C/ communicate with the recesses. In' these sockets are arrangedsprings ()2, which bear outwardly on the under sides of packing-stri psC3, arranged in the recesses, the outer faces of the packing'- stripsbeing curved to fit snugly against the sides of the cylinder A.

The-cylinder-heads D are formed with annular exterior shoulders D/,which increase the thickness of the ends, and annular grooves D2 areformed on the inner faces of the ends coinciding with the exteriorshoulders D@ Packing -strips Dif are. arranged in these grooves, andsprings D4, also arranged in the grooves, bear on the packing-strips andforce same outwardly in close engagement with the sides of the rim orperiphery of the wheel B'. The packing-rings D3 are formed in twosectionsean inner and an outer sectionthe meeting faces of thesesections being oppositely angled, so that the thrust of the springs Diis both outward and lateral, thereby making a tight joint.

A sliding head or abutment Eis adapted to contact on the periphery ofthe wheel B, and a stem E is connected to this sliding head. The head isadapted to move vertically between the parallel walls of the casing A',the stem working through a suitable stuffing-box formed on the casingA', and above the stuffing-box the stein is slotted, as shown at E2, theupper and lower walls of the slot being rounded. On one side of andadjacent the sliding head is a steam-inlet F, in which is arranged aone-way valve F, and on the opposite side of the sliding' head isarranged an exhaust-port Gr, normally open and not provided with avalve. The exhaust-port G is interiorly threaded, as shown, in orderthat an exhaust-pipe (not shown) thereto.

Extending longitudinally above and paralmay be secured IOC lcl with thecylinder A is a rock-shaft H, supported by a suitable bracket H andhaving secured thereto ad jacent each end rocker-arms H, and the outerend of one of these arms H2 rests in the slot Ff of the sliding-headstem E. A lifting-bar H3 is arrang'ed at the end of the cylinder A, overwhich one end of the rock-shaft H projects, and the upper portion of thebar works vertically through a sleeve H", and its upper end is pivotallyconnected to a link H, which in turn is pivoted to the outer or free endof the remaining rocker-arm H2. The lower end of the bar H:i is enlargedto form a shoe H, which rests upon a camwheel J. The cam projection ofthe camwheel J is bifurcated, and a cam-roller J is journalcd in thisbifurcated portion and is adapted to engage and lift the shoe H,lifting' also the bar H, link H5, and rocking the rockshaft H throughthe medium of the arm H2, to which the link H is attached, and impartingthe same rocking movement to the other rocker-arm H, thereby lifting thestem E and the sliding' head E.

Upon the opposite end of the shaft B to that which carries the cam-wheelJ is arranged an eccentric l, having the usual eccentricstrap K', rod K,and the cran k-arm Ki pivotcd at its free end to the rod K and connectedat its opposite end to the stem F2 of the valve F.

The operation of the engine is as follows: Steam enters the cylinder Athrough the valve F and inlet F, and as it cannot pass the sliding headE, which is down or in its lowest position, it forces around the pistonC, turning the wheel B' and shaft B. f hen the pistonhead has traveledone-thii'd of the distance around the cylinder, steam is cut off byaction of the eccentric K and connecting' parts and the steam works byexpansion until the piston passes the exhaust As the piston nears thesliding head after passing' the exhaustport Gr the head is drawn upwardinto the casing A by action of the cam-roller J on the shoe H" and thepiston-head passes beneath the sliding' head. As the piston-head passesthe steam-inlet F the valve is again opened and a new cycle iscommenced.

It will be seen from the above that the construction and operation ofthe engine are very simple.

Having thus fully described my invention, what l claim as new, anddesire to secure by Letters Patent, is-

l. lhe combination with a rotary engine having a revoluble pistontherein, of a casing having parallel vertical walls, a sliding headadapted to move vertically between said walls and to project downwardinto the path of the piston, an upwardly and outwardly extending l stemconnected to the sliding head, a rockershaft, an arm secured to therocker-shaft and adapted to actuate the sliding-head stem, a lifting-baradapted to move vertically and arranged at an end of the said engine, anarm secured on the rocker-shaft and terminating adjacent the upper endof the lifting-bar, a link pivotally connecting the last-mentioned armand the lifting-bar, and a cam on the engine-shaft adapted to lift saidbar as the piston approaches the sliding head.

2. The combination with a rotary engine having -a piston and a shaftdriven by the piston, of a cam-wheel on said shaft having abifurcatedcam portion, a roller in said bifurcated portion, a sleeve arrangedabove the cam-wheel, a lifting-bar movable vertically in the said sleeveand having a shoe formed at its lower end adapted to normally rest onthe cam-wheel and to be engaged by the camroller, a rock-shaft, arocker-arm secured to the said shaft adjacent its outer end, a pivotedlink connecting the upper end of the lifting-bar and the outer free endof the rockerarm, a sliding head adapted to extend normally into thepath of the piston, a slotted stem connected to said head, and arocker-arm secured to the rock-shaft and having' its free end inengagement with the slot of theI stem of thc sliding head.

3. In a rotary engine, a cylinder, cylinderheads, annular, exteriorshoulders formed on the said heads, annular grooves formed on the innerfaces of the cylinder-heads coincident with the shoulders, springs inthe grooves, a sectional packing-ring arranged in the said grooves themeeting faces of the sections being' oppositely angled, a shaft throughthe cylinder, and a wheel keyed to the shaft and having its sidesbearing on the outer section of the said packing-rings.

LL. A rotary engine comprising a cylinder, a rotatable shaft journaledtherein, a wheel keyed to the said shaft and extending from end to endof the cylinder, a piston-head arranged on the periphery of the wheelparallel to the shaft and extending from end to end of the cylinder,said piston-head being formed with two parallel, longitudinal recessesand having' sockets opening into said recesses, springs in the sockets,packing-strips arranged in the recesses and engaged by the springs, thesides of the said piston-head being outwardly divergent, and means foradmitting and exhausting steam from the said cylinder.

EDWARD UREN.

lVitnesses:

F. H. DENNY, FRANK 'J. Prrz.

